Day 65 of 100 Days Muscle Resistance Workout Challenge
Focus Topics: Chronic stress and muscle recovery. Learn how chronic low-level stress keeps the body in fight-or-flight mode, slowing muscle recovery and growth.
Learning Material
Most people think of fight-or-flight as something dramatic: a tiger jumps out, your heart races, and you sprint for survival. But the modern version is quieter, sneakier, and far more common.
It looks like:
- a tense jaw during emails
- worrying about tomorrow’s schedule
- waking up at 3 a.m. thinking about work
- pushing through exercise without adequate rest
- never fully “turning off”
This is called chronic low-level activation of the stress response.
It’s not intense enough to feel like panic, but it’s persistent enough to keep your body in alert mode, which blocks muscle repair, affects hormone balance, and drains energy over time.
Today, we’re exploring how this subtle stress steals strength, slows progress, and why becoming aware of it is the first step to regaining control.
Key Insight
1. The Body’s Stress Response Was Built for Survival, Not Paperwork
The fight-or-flight system evolved to respond to extreme threats.
In those moments, the body does three things immediately:
- Raises cortisol to mobilize energy
- Shuts down repair (muscle building, digestion, immune function)
- Keeps muscles tense and ready for action
If you were facing a wild animal, this would save your life.
But the body doesn’t distinguish between:
- A bear
- A deadline
- A bill
- A difficult meeting
- Overthinking
- A stressful commute
- High-intensity exercise without recovery
Everything registers as a threat, and cortisol rises in the same way, only now, there’s no sprint, no jump, no escape. Just tension without release.
2. Constant Alert Mode = Slow Muscle Growth
Recovery requires one thing above all else:
A nervous system that feels safe enough to repair.
When low-level stress persists for days or weeks, the body remains in a state of readiness rather than one of restoration. This leads to:
• Less muscle repair
Cortisol breaks down tissue for quick energy.
Great for emergencies, terrible for muscle growth.
• Lower training quality
Tired mind → sloppy form → injury risk
Stressed body → lower strength output → fewer adequate reps
• Worse sleep
Waking up at 3 a.m. is a classic sign that the stress system doesn’t fully “switch off.”
• Increased inflammation
Slows recovery and prolongs muscle soreness.
• Up-and-down muscle mass readings
Even when protein intake is adequate, stress alone can trigger muscle loss.
Your training isn’t happening in isolation; it’s happening inside a physiological environment shaped by stress, sleep, food, and thoughts.
This is at least what I learned for today, but seriously, I wish I had known this a bit earlier. I have done some crazy things that have made me feel very stressed out, such as taking 3 graduate courses while working full-time. Thankfully, it was only for a temporary condition, but I wonder how much these things can impact me. I keep doing this type of “challenge” to myself. However, I may be more stressed out than I thought, as I grind my teeth so much that I have no choice but to wear my mouth guard.
Real-World Example: The “Always On” Worker-Athlete
Imagine someone who:
- Works late
- Eats quickly between meetings
- Wakes up too early
- Does intense workouts to compensate for stress
- Never fully unwinds
On paper, this person “exercises regularly.”
But inside, their body is in:
Fight → Flight → Fight → Flight → Repeat
Their performance plateaus.
Their muscles feel flat and tired, their sleep becomes shallow, and their progress moves backward.
They’re not failing; they’re overloaded.
Their training isn’t the issue…
Their recovery system is simply never given a chance to breathe.
My Reflection
Last night, I did some stress-relieving exercises, stretching, and breathing, before going to bed. Unfortunately, I forgot to put my wristwatch back on after charging it, so I couldn’t track the results. I plan to do more stress-relief exercises again tonight to see if they help.
For my leg workout today, I slowed down every movement and focused closely on the muscles I was targeting. It was much harder, and I felt a deeper muscle burn. It’s the kind of pain that comes from real engagement, so I expect some soreness tomorrow.
My weight went up by 0.6 pounds, with 0.4 of that being muscle. I also had a slight muscle ache this morning, which I expected after adding extra exercises last night.
I’m also thinking seriously about working more on my chest area. I’ve been feeling more tension around my shoulders lately, likely because of my breast size. As I get older, the weight affects my shoulders more noticeably. I’m not sure which chest exercises would be most helpful, so I’ll spend some time researching that over the weekend.
Biometric data
Change in Weight from Day 1: -5.4lb.
Skeletal Muscle: 39.7%
Muscle Mass: 94 lb.
Adjustment Ideas (Strategic Adjustment)
1. A “Signal to Switch Off” Ritual: Pick one small action (stretching, 30 seconds of slow breathing, herbal tea, dimming lights) to signal your body that the day is ending. This helps lower cortisol before bed.
2. Replace 1 Intense Set With a Slow Set: This reduces overall stress on the nervous system while still stimulating muscles effectively.
3. Micro-Breaks at Work: Every 45–60 minutes, take a 30-second pause: roll your shoulders, look away from screens, unclench your jaw. This helps stop your stress response from accumulating throughout the day.